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If the two stage rocket of a weights 100 kg and 10 kg separately and contains 800 kg and 90 kg fuel
separately, what is the final velocity that can be achieved with an exhaust velocity of 1.5 km/sec. (Given
log10 =2.3 and log102 =0.3 )
Find the moment of inertia of a circular disc (i) about an axis through its center and perpendicular
to its plane (ii) about a diameter.
4.) Two parallel wires are separated by a distance of 0.05 m. Wire 1 carries a carries current of 12.0 A. Wire 2 carries a current of 6.0 A flowing in the opposite direction as shown in the illustration. Find the (a) magnitude and direction of the magnetic field created by wire 1 at wire 2, (b) force exerted by wire 1 on the 2.0 m long section of wire 2, and (c) force exerted by wire 2 on wire 1.
5.) What should be the length of an ideal solenoid consisting of 1250 turns for the magnetic field in its interior to be 0.025 T? A current of 2.0 A is flowing through the solenoid.
1.) A proton moves through a uniform magnetic field of magnitude 2.0 µT=2.0 x 10^6 T at a speed of 5.00 x 10^6 m/s. (a) What is the magnitude of maximum magnetic force it can experience?
(b) If the proton is replaced by an electron, will it experience the same maximum force?
2.) A 55.0 m wire carries a current of 2.25 A in a location where Earth's magnetic field is 4.5 x 10^3 T. The wire experiences a force of 0.15 N. Find the angle between the wire and the magnetic field.
3.) A long straight wire carries a current of 1.0 A.
(a) At what distance from the wire is the magnitude of the magnetic field equal to 2.5 x 10^-5 T?
(b) What is the magnitude of the magnetic force that this wire will exert on a 3.0 nC particle moving at 4.2 x 10^4 m/s perpendicular to the field at that distance?
1. Determine the current in and voltage drop across each resistor
R1= 6 ohms(vertical) connected to R2= 4 and R3= 12(which are in the middle and in horizontal form), connected to R4= 8(vertical form); V= 60V
2. Find the equivalent resistance of the combination of resistors shown below.
Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 (2.0m / m / s and Betty has a speed of How long does it take for them to meet?
A cardinal flies east for 2.9 s in a horizontal plane
for a distance of 22 m from a fence post to a bush.
It then flies north another 11 m to a bird feeder
for 1.5 s.
(a) Calculate the total distance travelled.
(b) Calculate the cardinal’s average speed.
(c) Calculate the cardinal’s average velocity.
A child is dragging a small crate across the horizontal floor as shown in the figure above. She is dragging the crate using a string such that the tension force in the string is 20 N.
If the crate has a mass of 9.2 kg and is accelerating at a rate of 0.55 m s−2 then what is the magnitude of the friction force on the crate from the floor? (to 2 s.f)
Radiation with a frequency of 7.52 × 1014 Hz illuminates a photoelectric surface in a photoelectric cell. If the work function of this surface is 2.20 eV, what is the maximum kinetic energy of the emitted electrons, and what stopping voltage would be required to reduce the current through this cell to zero?
Two-point charges, q1, which has a charge of -76.11 uC and q2, which has a charge of 13.33 uC, are separated by a distance of 24.67 cm. Identify the field's magnitude at point A between the two charges if A is 10.39 cm away from the negative charge.
#333702 on Dec 2022